Paper-cutter.



Patented Jan. 18, 1910.

UNITED STATES PATENT OFFICE.

WIL LIAM C. FULLER, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMENTSTO UNION PAPER BAG MACHINE COMPANY, OF PHILADELPHIA, PENNSYLVANIA, -A.

CORPORATION OF PENNSYLVANIA.

PAPER-CUTTER.

Specification of Letters Patent. Patented Jan, 18, 1910.

Application filed August 17, 1905. Serial No. 274,607.

.. upon by'suitable mechanism to form the bottom and complete the bags.

My present form of cutter has been cm bodied in the echanism of a paperbag machine which l orms the subject matter of another application forpatent.

My invention is fully shown in the accompanying drawing, in which: 1

Figure 1, is an end elevation of the cutter forming the subject of myinvention, showing also the mounting for the same; Fig. 2, is asectional end elevation; Fig. 3, is an inverted plan v ew of the knifecarrying member; Fig. 4, is a similar view. illustrating a modified formof knife, and Fig. 5, is asectional view of a detail of my invention.

In the drawing, 1 represents the lower member, comprising a rotatingroll carrying an anvil or cutting surface 2, with which a knife 3capable of making a straight or shear cut and carried by the uppermember 4, also a rotating roll, is adapted to coact and cutanythingpassed between the same. The moment of engagement is so slight that thepaper may be severed immediately and without danger of dulling'to anyappreciable extent the cntting edge of the knife blade. The spindlescarrying the knife rolls are provided with gear wheels 1' and 4,respectively, said wheels meshing so that the rolls may be driven inunison by power applied to either one. In some instances the anvil maybe recessed as shown in Fig. 5, in the form of a shallow groove 5 extening throughout its entire length in line with the knife edge. The rollor member 4 carrying the cutting blade is mounted in spring boxes 6 sothat such blade can give under any excess of pressure due to thethickness of'the material passing between the same.

The anvil is preferably of machinery or hard steel to insure thepositive action of the cutting blade and I have found in practice inusing this material that it causes no appreciable dulling of such blade.In some instances I may combine with this blade 3,

other blades set at right angles thereto for the purpose, when it isemployed in paper bag machines, ofisimultaneously slitting one end ofthe bag blanks to form tongues which are afterward folded and pasteddown against the bottom of the bags.

In Fig. 4, I have shown a blade having two straight portions 10, and acurved portion 11 between the same, such blade being designed to. cut aspecial form of bag blank. If desired, blades of any other design may beused, it being only necessary that their cutting edge shall follow thearc of a circle struck from the center of rotation of theircarrier. Theanvil may be arranged. to co act with 'such blade in whatever form thelatter may be, and in all instances the 'anvil may be removed when wornand a new one replaced.

Having thus described my invention, I claim and desire to secure byLetters Patent: In a structure of the character described, thecombination of a rotatable member carrying a knife blade disposedsubstantially in a longitudinal direction, a second rotatable memberdispcsed below and in the same vertical plane as the first, an anvil ofhard metal carried by said second member and dis osed for coaction withthe knife blade w on said members are rotated, the

knife blade directly engaging said anvil,

spindles for the said members suitably journaled, meshing gear wheelscarried by said spindles whereby said members may be rotated in unisonto maintain proper cooperative relation of the knifeand anvil, and meansfor maintaining the member carrying the knife .blade under tension so asto insure the engagement of said knife blade with the anvil.

'In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

WILLIAM G. FULLER

